Using Optum claims data from 2009 to 2021, they identified 524 IgG4-RD pts (mean age 56 yrs), incidence increased over time 0.78 to 1.39/100K Pt Yrs 2015 and 2019. Prevalence (1/19) was 5.3/100K Pt-Yrs, w/ mortality rate 3.42/100 Pt-Yrs (HR 2.51) https://t.co/22eIjtC7kp https://t.co/8RlEtZiX9j